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Pulsed Jet Emission
I now have 4 different 2.5D pulsed jet runs, each at 2 different resolutions. The high resolution is at the same resolution that de Colle & Raga used. The low resolution is half of that. The low resolution runs seem less reliable in terms of cooling. The higher resolution runs show more structure, and the jet head evolution is different. This must be due to resolving the cooling length. In the image below (hydro runs), the low resolution run is on the left, and the high resolution run is on the right:
Since this resolution dependency also affects the emission, I have chosen to only do emission maps from the high resolution runs.
Emission Maps
Using the new 2.5D projections object, I was able to create emission maps. In theory, I could make maps for any emission line that I want, but I am only going to show Halpha and SII (6716 + 6731) for now. There are a couple of different ways to visualize the emission data, but I find the truecolor plots to be pretty neat. The scaling for the truecolor plots is done in a way that Jonathan described in a previous post (johannjc02202013).
Halpha is red, SII is green, and where they mix is yellow.
| Beta | Inf (hydro) | 5 | 1 | 0.4 |
|---|---|---|---|---|
| Emission |  |  |  | 
|
Clump Emission Analysis
Figure 4 of de Colle & Raga shows a more quantitative analysis of how the magnetic field affects the Halpha emission for each of the 5 clumps within the jet. They plotted the ratio (MHD / Hydro) of the total Halpha emission for each clump. The result is pretty conclusive; as B increases, Halpha increases. I have tried constructing a similar plot with the low resolution runs, but the results don't follow a conclusive trend, so again I am only going to show the plot for the high resolution runs.
The total Halpha emission of a clump is found by summing the Halpha emission inside a circle of radius 1.4 centered at each clump. The clump positions are taken to be z = 6.2, 12.5, 19.37, 25.7, 32.53.
The numbers for the high resolution runs didn't make much sense either. Some clumps showed increase in Halpha with increase in B, while others showed decrease or little change in Halpha. I need to rethink how the Halpha and other emission lines are being calculated, or maybe come up with a better diagnostic.
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- resolutiondiff.png (93.4 KB) - added by 12 years ago.
- true_emiss_hydro.png (140.8 KB) - added by 12 years ago.
- true_emiss_04.png (195.6 KB) - added by 12 years ago.
- true_emiss_1.png (200.7 KB) - added by 12 years ago.
- true_emiss_5.png (152.3 KB) - added by 12 years ago.
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